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vfree(9) [centos man page]

VFREE(9)						    Memory Management in Linux							  VFREE(9)

NAME
vfree - release memory allocated by vmalloc SYNOPSIS
void vfree(const void * addr); ARGUMENTS
addr memory base address DESCRIPTION
Free the virtually continuous memory area starting at addr, as obtained from vmalloc, vmalloc_32 or __vmalloc. If addr is NULL, no operation is performed. Must not be called in NMI context (strictly speaking, only if we don't have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling conventions for vfree arch-depenedent would be a really bad idea) NOTE
assumes that the object at *addr has a size >= sizeof(llist_node) COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 VFREE(9)

Check Out this Related Man Page

SHMAT(2)						      BSD System Calls Manual							  SHMAT(2)

NAME
shmat, shmdt -- attach or detach shared memory LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/types.h> #include <sys/ipc.h> #include <sys/shm.h> void * shmat(int shmid, const void *addr, int flag); int shmdt(const void *addr); DESCRIPTION
The shmat() system call attaches the shared memory segment identified by shmid to the calling process's address space. The address where the segment is attached is determined as follows: o If addr is 0, the segment is attached at an address selected by the kernel. o If addr is nonzero and SHM_RND is not specified in flag, the segment is attached the specified address. o If addr is specified and SHM_RND is specified, addr is rounded down to the nearest multiple of SHMLBA. The shmdt() system call detaches the shared memory segment at the address specified by addr from the calling process's address space. RETURN VALUES
Upon success, shmat() returns the address where the segment is attached; otherwise, -1 is returned and errno is set to indicate the error. The shmdt() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS
The shmat() system call will fail if: [EINVAL] No shared memory segment was found corresponding to shmid. [EINVAL] The addr argument was not an acceptable address. The shmdt() system call will fail if: [EINVAL] The addr argument does not point to a shared memory segment. SEE ALSO
shmctl(2), shmget(2) BSD
August 2, 1995 BSD
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